Order from least to greatest.

3.5, -2.1, square root of 9, -7/2, and square root of 5.

Nell has a sales clerk job that pays $12 per hour for regular gas work hours. she gets double time for any hours over 40 that she works in a week. how many hours did nell work if her weekly pay was $744

Arectangle with an area of 47 m² is dilated by a factor of 7. what is the area of the dilated rectangle? enter your answer in the box. do not leave your answer as a fraction.

Asphere has a diameter of 10 in. what is the volume of the sphere?